85179897 has 16 divisors (see below), whose sum is σ = 137664960. Its totient is φ = 51624000.

The previous prime is 85179889. The next prime is 85179901. The reversal of 85179897 is 79897158.

It is not a de Polignac number, because 85179897 - 2³ = 85179889 is a prime.

It is a super-2 number, since 2×85179897² = 14511229705861218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85179817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143104 + ... + 143697.

It is an arithmetic number, because the mean of its divisors is an integer number (8604060).

Almost surely, 2^85179897 is an apocalyptic number.

It is an amenable number.

85179897 is a deficient number, since it is larger than the sum of its proper divisors (52485063).

85179897 is a wasteful number, since it uses less digits than its factorization.

85179897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286821 (or 286815 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 54.

The square root of 85179897 is about 9229.2955852546. The cubic root of 85179897 is about 439.9929354926.

The spelling of 85179897 in words is "eighty-five million, one hundred seventy-nine thousand, eight hundred ninety-seven".